feat(projects): add project-specific member rates

apps/time_entries/tests/test_services.py

@@ -1,10 +1,11 @@
 from datetime import timedelta
+from decimal import Decimal
 
 from django.test import TestCase
 from django.utils import timezone
 from rest_framework.exceptions import ValidationError
 
-from apps.projects.models import Project
+from apps.projects.models import Project, ProjectAccess, ProjectUserRate
 from apps.tags.models import Tag
 from apps.time_entries.services.time_entries import (
     create_time_entry,
@@ -12,14 +13,21 @@ from apps.time_entries.services.time_entries import (
     update_time_entry,
 )
 from apps.users.models import User
-from apps.workspaces.models import Workspace
+from apps.workspaces.models import Workspace, WorkspaceMembership, WorkspaceUserRate
 
 
 class TimeEntryServiceTests(TestCase):
     @classmethod
     def setUpTestData(cls):
         cls.user = User.objects.create_user(mobile="09121111111", password="secret123")
+        cls.member = User.objects.create_user(mobile="09121111112", password="secret123")
         cls.workspace = Workspace.objects.create(name="Core", owner=cls.user)
+        WorkspaceMembership.objects.create(
+            workspace=cls.workspace,
+            user=cls.member,
+            role=WorkspaceMembership.Role.MEMBER,
+            is_active=True,
+        )
 
     def test_create_time_entry_allows_only_one_running_timer_per_workspace(self):
         create_time_entry(
@@ -97,3 +105,36 @@ class TimeEntryServiceTests(TestCase):
             ),
             [tag.id],
         )
+
+    def test_create_billable_time_entry_uses_project_user_rate_override(self):
+        project = Project.objects.create(workspace=self.workspace, name="Override project")
+        ProjectAccess.objects.create(project=project, user=self.member)
+        WorkspaceUserRate.objects.create(
+            workspace=self.workspace,
+            user=self.member,
+            hourly_rate=Decimal("10.00"),
+            currency="USD",
+            effective_from=self.workspace.created_at,
+            is_active=True,
+        )
+        ProjectUserRate.objects.create(
+            project=project,
+            user=self.member,
+            hourly_rate=Decimal("20.00"),
+            currency="EUR",
+            effective_from=self.workspace.created_at,
+            is_active=True,
+        )
+
+        entry = create_time_entry(
+            user=self.member,
+            workspace_id=self.workspace.id,
+            start_time=timezone.now() - timedelta(minutes=30),
+            end_time=timezone.now(),
+            project=project,
+            description="Billable work",
+            is_billable=True,
+        )
+
+        self.assertEqual(entry.hourly_rate, Decimal("20.00"))
+        self.assertEqual(entry.currency, "EUR")